使用组元素旋转SVG圆

debugcn 发表于 Dev

杰克·鲍威尔

我想旋转SVG圆，同时防止其他元素旋转

当我尝试使用rotateZ（15deg）旋转圆（白色）时，这是我得到的：

到目前为止，这是我的进步：https : //jsfiddle.net/41hrnojs/

<svg viewBox="0 0 1400 900" style="outline:1px solid red;">
            <g>
               <clipPath id="hexagonal-mask">
                  <circle cx="700" cy="100" r="705" ></circle>
               </clipPath>
            </g> 
            <a>
             <image clip-path="url(#hexagonal-mask)" height="100%" width="100%" xlink:href="{{ asset('images/H3z50J2.jpg') }}"  style="transform: translateY(-140px);"/>
            </a>

            <g  style="transform-origin: 701px -5%; transform: rotateZ(15deg)">
                <circle cx="701" cy="0" r="665" stroke="#fff" stroke-width="1px" fill="transparent"  style="transform: translateY(-50px);" ></circle>
               
                <!-- center dot -->
                <g id="g1" >
                    <circle cx="701" cy="615" r="15" fill="#fff">
                        
                    </circle> 
                    <path  stroke="#000" stroke-width="1px" d="M701 630 701 690"></path>
                   
                    <text x="672" y="720" font-family="'Playfair Display', serif" font-size="2em" font-weight="bold" fill="#9d9e9f">2007</text>
                    <text x="640" y="730" font-family="'Playfair Display', serif" font-size="2.85em" font-weight="bold" fill="#000">
                        <tspan x="640" dy="40">Lorem</tspan>
                        <tspan x="640" dy="45">Ipsum</tspan>
                    </text>
                    
                    <animateMotion 
                       xlink:href="#g1"
                       dur="1s"
                       begin="click"
                       fill="freeze"
                       path="M0 100 Q50 80 -399 -135"
                       repeatCount="1">
                        
                    </animateMotion>
                </g>
                
                
                

                <!-- left dot -->
                <g>
                    <!-- <circle cx="305" cy="485" r="15" fill="#fff"></circle> -->
                    <circle cx="302" cy="480" r="15" fill="#fff"></circle>
                    <path stroke="#000" stroke-width="1px" d="M302 495 305 675"></path>
                </g>

                <!-- right dot -->
                <g>
                    <circle cx="1100" cy="480" r="15" fill="#fff"></circle>
                    <path  stroke="#000" stroke-width="1px" d="M1100 495 1100 675"></path>
                </g>
            </g>

        </svg>

我想实现

单击白色
圆圈上的点时，圆圈（白色）旋转

仙客来

不用旋转所有内容，我将计算圆上点的位置并使用点的坐标绘制线条和文本。

为此，我正在使用javascript。脚本中最重要的部分是用于计算旋转点的新位置的函数：rotatePoint(p, c, rot)

请注意，在svg中，我消除了无用的转换。

let theG = document.querySelector("#theG");
//the center of the circle
let center = { x: 700, y: -40 };
//thr rotation in radians
let rot = .6;
//a  function to calculate the new position of a rotated point
function rotatePoint(p, c, rot) {
  // p: the point
  // c: the center of rotation
  // rot: the rotation
  let cos = Math.cos(rot);
  let sin = Math.sin(rot);
  return {
    x: c.x + (p.x - c.x) * cos - (p.y - c.y) * sin,
    y: c.y + (p.x - c.x) * sin + (p.y - c.y) * cos
  };
}


//all the groups with a class of dot
let groups = theG.querySelectorAll(".dot");
let points = [];

groups.forEach((g) => {
  let dot = g.querySelector("circle");
  let p = {};

  p.x = dot.getAttribute("cx");
  p.y = dot.getAttribute("cy");
  
  points.push(p)
});


itr.addEventListener("input",()=>{
  
let rot = itr.value;

groups.forEach((g,i) => {
  
  let dot = g.querySelector("circle");
  let line = g.querySelector("line");
  let t1 = g.querySelectorAll("text")[0];

  let newPoint = rotatePoint(points[i], center, rot);

  dot.setAttribute("cx", newPoint.x);
  dot.setAttribute("cy", newPoint.y);

  line.setAttribute("x1", newPoint.x);
  line.setAttribute("x2", newPoint.x);
  line.setAttribute("y1", newPoint.y);
  line.setAttribute("y2", newPoint.y + 180);

  t1.setAttribute("x", newPoint.x);
  t1.setAttribute("y", newPoint.y + 200);

});
  
});

input{width:90vw;}
p{text-align:center;}
text{text-anchor:middle}

line{stroke:#000; stroke-width:1px; }

<p><input type="range" id="itr" min="-.85" max=".85" value="0" step=".01" /></p>

<svg viewBox="0 0 1400 900" style="outline:1px solid red;" >
   <defs>
    <clipPath id="hexagonal-mask">
      <circle cx="700" cy="-40" r="705"></circle>
    </clipPath>
  </defs>
  <image clip-path="url(#hexagonal-mask)" height="100%" width="100%" xlink:href="https://assets.codepen.io/222579/castell.jpg"></image>
  <circle cx="700" cy="-40" r="655" stroke="#fff" stroke-width="1px" fill="transparent"></circle>
  <g id="theG">

    <g class="dot">
      <circle cx="700" cy="615" r="15" fill="#fff"></circle>
      <line x1="700" y1="615" x2="700" y2="795"></line>
      <text x="700" y="815" font-family="'Playfair Display', serif" font-size="2em" font-weight="bold" fill="#9d9e9f">2007</text>
    </g>

    <g class="dot">
      <circle cx="302" cy="480" r="15" fill="#fff"></circle>
      <line x1="302" y1="480" x2="302" y2="660"></line>
      <text x="302" y="680" font-family="'Playfair Display', serif" font-size="2em" font-weight="bold" fill="#9d9e9f">2006</text>
    </g>

    <g class="dot">
      <circle cx="1100" cy="480" r="15" fill="#fff"></circle>
      <line x1="1100" y1="480" x2="1100" y2="660"></line>
      <text x="1100" y="680" font-family="'Playfair Display', serif" font-size="2em" font-weight="bold" fill="#9d9e9f">2008</text>
    </g>
  </g>
</svg>

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